<PRE><B>Question 753668</B>
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1.  1 + 3 + 9...


*[tex \LARGE  \sum_{i=0}^7\,3^i]


*[tex \LARGE 3^0\ =\ 1]


*[tex \LARGE 3^1\ =\ 3]


*[tex \LARGE 3^2\ =\ 9]


*[tex \LARGE 3^3\ =\ 27]


And so on...you can do your own arithmetic.  Hint:  Only go up to *[tex \LARGE 3^7] because of the zero based count on *[tex \LARGE i]


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
&lt;font face=&quot;Math1&quot; size=&quot;+2&quot;&gt;Egw to Beta kai to Sigma&lt;/font&gt;
My calculator said it, I believe it, that settles it
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